create new tag
view all tags

Linear Amplifier Alignment Tweak

When using the main laser, it appeared the beam was being clipped somewhere. By taking burn paper marks it seemed as thought the beam was clipping in the linear amplifiers somewhere. WinCam #3 was used to look at the beam outside the laser. The alignment through the linear amplifiers was adjusted by tweaking the turning mirror immediately before them. Burn paper marks shown below were taken after adjusting the alignment showing a now roughly circular beam.

Given the beam has now been adjusted to have a more Gaussian profile, it is more difficult to identify the shape properly on burn paper. With a top hat profile that the laser originally had, the edge of the beam was much clearer.

Burn Paper Marks

After RGA

Figure 1: After the RGA and the isolator


Figure 2: Immediately before the linear amplifiers

After linear amplifiers (IR)

Figure 3: Immediately before the SHG crystal

After linear amplifiers (green)

Figure 4: At output window of laser.

Edit | Attach | Watch | Print version | History: r2 < r1 | Backlinks | Raw View | Raw edit | More topic actions

Physics WebpagesRHUL WebpagesCampus Connect • Royal Holloway, University of London, Egham, Surrey TW20 0EX; Tel/Fax +44 (0)1784 434455/437520

Topic revision: r2 - 21 Nov 2010 - LauraCorner

This site is powered by the TWiki collaboration platform Powered by PerlCopyright © 2008-2023 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding RHUL Physics Department TWiki? Send feedback